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Korean Age Calculator

Enter your birth date and year, and the calculator will determine your Korean age.

Calculate with:

Year of birth:

Current year:

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Korean Age Calculator

An online Korean age calculator helps you determine your age according to the traditional Korean age system. Below, we explain the difference between International (American) age and Korean age.

Note: South Korea officially adopted the international age system in 2023 for legal and administrative purposes. However, the traditional Korean age system still holds cultural significance.

What Is Korean Age?

"Korean age is a traditional method used in Korea to calculate a person’s age."

Korean Age System

In the traditional system, a person is considered 1 year old at birth, and everyone gains one year on January 1st each year, regardless of their actual birthday.

This often makes Korean age one or two years higher than international age.

Why Was Korean Age Different?

A baby starts at 1 year old at birth.
Everyone adds one year on January 1st.

This means a baby born on December 31 could become 2 years old in Korean age on January 1, just one day later.

Why Is Age Important in Korea?

Age plays a key role in Korean culture. It determines:

Speech level and politeness
Social hierarchy
Forms of address

Even though international age is now used legally, age remains culturally significant in daily interactions.

Example: Jungkook’s Korean Age

Jeon Jung-kook (member of BTS) was born on September 1, 1997.

International Age (in 2022):

September 1, 2022 → 25 years

Traditional Korean Age (in 2022):

January 1, 2022 → 26 years
September 2022 → 26 years

Legal Age in South Korea

Under the international age system:

Legal adult age: 19 years (international age)
Drinking age: 19 years (international age)

Previously, this corresponded to 20 years in traditional Korean age.

How to Calculate Korean Age

Traditional Formula

Korean Age = Current Year − Birth Year + 1

Quick Method Using International Age

If your birthday has passed this year: Korean Age = International Age + 1
If your birthday has not passed yet: Korean Age = International Age + 2

Example #1

Born in 1990. What was Korean age in 2021?

Korean Age = 2021 − 1990 + 1

Korean Age = 32 years

Example #2

If your international age is 12 and your birthday has passed:

Korean Age = 12 + 1

Korean Age = 13 years

Korean Age vs International Age Chart

International Age	Traditional Korean Age
0	1
1	2
5	6
10	11
20	21
30	31
40	41
50	51
60	61
70	71
80	81
90	91
100	101

How the Korean Age Calculator Works

Input Options:

Enter your birth year and current year
Or enter your current international age
Indicate whether your birthday has passed this year

Output:

Your calculated traditional Korean age

FAQ

Are babies born 1 year old in Korea?

In the traditional system, yes. A baby is considered 1 year old at birth.

Is Korean age still used?

As of 2023, South Korea officially uses the international age system for legal purposes. Traditional Korean age is still used culturally in some situations.

Why do Koreans ask your age?

Age determines respect levels, speech style, and social hierarchy in Korean culture.

What is the age difference usually?

Traditional Korean age is typically 1–2 years older than international age.

Conclusion

Korean age reflects deep cultural traditions in Korea. Although international age is now the official standard, understanding the traditional system helps you better understand Korean culture and social interactions. Use a Korean age calculator for quick and accurate results.

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